# JASC 6121: Propeller Synchronizer Section

- Type: JASC system/component code (FAA)
- ATA chapter: 61 Propeller/Propulsors
- Title in the code table: PROPELLER SYNCHRONIZER SECTION
- Service difficulty reports: 37
- FAA code table: https://www.faa.gov/sites/faa.gov/files/JASC_Code.pdf#page=56
- Page: https://openairdocs.org/jasc/6121

## What it covers

The unit which controls the synchronization of propellers on multi-engine aircraft. Typical parts are synchronizer actuator, computer, synchrophaser, control unit, etc.

## Latest service difficulty reports

- [SDR LR7A2025041303753](https://openairdocs.org/sdr/LR7A2025041303753), Apr 13, 2025: SYNCHROPHASER, INOPERATIVE (N407LC)
- [SDR CA130822009](https://openairdocs.org/sdr/CA130822009), Aug 19, 2013: MODULE, INOPERATIVE
- [SDR QMLA2013041713054](https://openairdocs.org/sdr/QMLA2013041713054), Apr 17, 2013: SCREW, MISSING (N912SM)
- [SDR CA111117026](https://openairdocs.org/sdr/CA111117026), Oct 28, 2011: CONTROL BOX, FAULTED
- [SDR MASA2011032402233](https://openairdocs.org/sdr/MASA2011032402233), Mar 21, 2011: SWITCH, JAMMED (N989HA)
- [SDR NSVA2010169](https://openairdocs.org/sdr/NSVA2010169), Sep 20, 2010: SYNCRONIZER, MALFUNCTIONED (N341CJ)
- [SDR CA090615011](https://openairdocs.org/sdr/CA090615011), Jun 13, 2009: MODULE, BURNED OUT
- [SDR SWIA200819594](https://openairdocs.org/sdr/SWIA200819594), May 5, 2008: CONNECTOR, CONTAMINATED (N236SW)
- [SDR HNAA0800031](https://openairdocs.org/sdr/HNAA0800031), Jan 9, 2008: PCU, DEFECTIVE (N828EX)
- [SDR CA060424008](https://openairdocs.org/sdr/CA060424008), Apr 21, 2006: SHAFT, BROKEN
- [SDR HNAA0400109](https://openairdocs.org/sdr/HNAA0400109), Aug 10, 2004: WIRE HARNESS, CHAFED (N835EX)
- [SDR 364032](https://openairdocs.org/sdr/364032), Dec 30, 2003: SWITCH, SPARKS (N172MJ)
- [SDR BAQA090685](https://openairdocs.org/sdr/BAQA090685), Nov 10, 2003: ACTUATOR, FAILED (N999G)
- [SDR BAQA090299](https://openairdocs.org/sdr/BAQA090299), Oct 23, 2003: SYNCHROPHASER, INOPERATIVE (N999G)
- [SDR J7B2003F00001](https://openairdocs.org/sdr/J7B2003F00001), Oct 10, 2003: COIL, SEPARATED (N421GF)
- [SDR CA020722012](https://openairdocs.org/sdr/CA020722012), Jul 11, 2002: HOUSING, FAILED
- [SDR SIMA0252](https://openairdocs.org/sdr/SIMA0252), Jan 25, 2001: WARNING LIGHT, MALFUNCTIONED (N250AE)
- [SDR 20010112SG046](https://openairdocs.org/sdr/20010112SG046), Dec 12, 2000: SWITCH, SHORTED (N228GL)
- [SDR 20010112SG023](https://openairdocs.org/sdr/20010112SG023), Nov 29, 2000: SWITCH, SHORTED (N228GL)
- [SDR 20010111SG008](https://openairdocs.org/sdr/20010111SG008), Oct 16, 2000: SWITCH, SHORTED (N228GL)
- [SDR COMA0010315](https://openairdocs.org/sdr/COMA0010315), Aug 6, 2000: PICKUP, OUT OF ADJ (N258CA)
- [SDR VNAA0007003](https://openairdocs.org/sdr/VNAA0007003), Jul 4, 2000: SWITCH, FAILED (N437JS)
- [SDR CA000712031](https://openairdocs.org/sdr/CA000712031), Jun 23, 2000: HUB, CORRODED
- [SDR VNAA0004012](https://openairdocs.org/sdr/VNAA0004012), Apr 6, 2000: PCU, FAILED (N426JS)
- [SDR C2XA99CL128](https://openairdocs.org/sdr/C2XA99CL128), Dec 17, 1999: SWITCH, FAILED (N81553)
- [SDR HEEA063064](https://openairdocs.org/sdr/HEEA063064), Aug 12, 1999: SYNCROPHASER, ERRATIC
- [SDR MASA99084](https://openairdocs.org/sdr/MASA99084), May 26, 1999: SWITCH, LOOSE (N2YV)
- [SDR SWIA971259](https://openairdocs.org/sdr/SWIA971259), Sep 3, 1998: SYNCHRONIZER, MALFUNCTIONED (N226SW)
- [SDR SWIA971237](https://openairdocs.org/sdr/SWIA971237), Aug 5, 1998: PROP SYNCH, MALFUNCTIONED (N289YV)
- [SDR 98ZZZM639](https://openairdocs.org/sdr/98ZZZM639), Jul 17, 1998: ACTUATOR, FAILED (N566EA)
- [SDR AU980579](https://openairdocs.org/sdr/AU980579), May 28, 1998: ACTUATOR, FAILED
- [SDR 96ZZZX3540](https://openairdocs.org/sdr/96ZZZX3540), Jun 21, 1996: CONTROL BOX, SHORTED (N6221C)
- [SDR HEEA967054](https://openairdocs.org/sdr/HEEA967054), Apr 18, 1996: ACTUATOR, FAILED (N30PH)
- [SDR CA960123011](https://openairdocs.org/sdr/CA960123011), Jan 5, 1996: CONNECTOR, CRIMP FAILED
- [SDR 96ZZZX3976](https://openairdocs.org/sdr/96ZZZX3976), Nov 20, 1995: SYNC ACTUATOR, FAILED (N711PK)
- [SDR 95ZZZX6059](https://openairdocs.org/sdr/95ZZZX6059), Oct 10, 1995: ACTUATOR, PIN SHEARED (N1950G)
- [SDR COMA9531165](https://openairdocs.org/sdr/COMA9531165), Sep 26, 1995: GOVERNOR, DEFECTIVE (N320CA)

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